Peter Enns said this quote

“ In the New Testament, God's steadfast love and faithfulness are seen, not in an act of deliverance from foreign enemies, but in sending the Son and raising Him from the dead to enact a global rescue mission (Romans 8:3.) Jesus is God's supreme, grand, climactic act of faithfulness. Not only that, but faithful also describes Jesus. Paul writes, We know that a person is justified not by the works of the law but in faith in Jesus Christ (Galations 2:16...). A better reading is faithfulness of Jesus Christ -- which is found in footnotes of many Bibles -- and the two readings couldn't be more different... Paul isn't saying, You are not justified by your efforts but by your faith. The contrast he's making isn't between two options we have; the contrast is between your efforts and Jesus' faithfulness to you, shown in His obedient death on a Roman cross. Paul is interested in telling readers what Jesus did, Jesus' faithfulness, not what we do. God's grand act of faithfulness is giving His son for our sake. God is all in. Jesus' grand act of faithfulness is going through with it for our sake. Jesus is all in. Now it's our move, which really is the point of all this. Like God the Father and God the Son, we are also called to be faithful. On one level, we are faithful to God when we trust God, but faith (pistis) doesn't stop there. It extends, as we've seen, in faithfulness toward each other, in humility and self-sacrificial love. And here is the real kick in the pants: When we are faithful to each other like this, we are more than simply being nice and kind -- though there's that. Far more important, when we are faithful to each other, we are, at that moment, acting like the faithful God and the faithful Son. Being like God. That's the goal. And we are most like God, not when we are certain we are right about God, or when we tell others how right we are, but when we are acting toward one another like the faithful Father and Son. Humility, love, and kindness are our grand acts of faithfulness and how we show that we are all in. ”